CN203561332U - Signal converter of wide-range submicron high-precision LVDT displacement sensor - Google Patents
Signal converter of wide-range submicron high-precision LVDT displacement sensor Download PDFInfo
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- CN203561332U CN203561332U CN201320694624.9U CN201320694624U CN203561332U CN 203561332 U CN203561332 U CN 203561332U CN 201320694624 U CN201320694624 U CN 201320694624U CN 203561332 U CN203561332 U CN 203561332U
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Abstract
The utility model relates to a signal converter of a wide-range submicron high-precision LVDT displacement sensor. The signal converter comprises an LVDT displacement sensor, a submicron high-precision signal converter and a PC. The LVDT displacement sensor is successively in connection with an AC amplifier, a synchronous sampler, an active filter, a high gain DC amplifier, an A/D converter and a single-chip microcomputer. The single-chip microcomputer is in connection with an excitation signal generator which is connected with a synchronous sampling pulse generator. The synchronous sampling pulse generator is in connection with the synchronous sampler. The high gain DC amplifier is in connection with an analog output interface. The single-chip microcomputer is in connection with a 232 serial interface. The PC is communicated with the single-chip microcomputer in a real-time manner via the 232 serial interface. The signal converter is wide in measuring range and high in precision. If the measuring range is from -200 micrometers to 200 micrometers, the precision is from -0.2 micrometers to 0.2 micrometers. If the measuring range is from -500 micrometers to 500 micrometers, the precision is from -0.5 micrometers to 0.5 micrometers. The measuring range can be from -3000 micrometers to 3000 micrometers to the maximum, and then the precision is from -2 micrometers to 2 micrometers.
Description
Technical field
The utility model relates to a kind of signal converter of inductance displacement sensor, relates in particular to a kind of signal converter of wide range submicron order high precision LVDT displacement transducer.
Background technology
At present, the signal converter of the LVDT full-bridge type inductance displacement sensor of domestic employing, during wide range, measuring accuracy is lower, and if: measurement range is when ± the 500um, precision is 10um; Measurement range is when ± 50um, and precision is 1um.When carrying out many kinds, high-acruracy survey, need frequent adjustment or gear switch, bring greater inconvenience to on-the-spot use, also affected the flexibility of measuring equipment self.
Utility model content
The purpose of this utility model is in order to overcome above-mentioned weak point, a kind of signal converter of wide range submicron order high precision LVDT displacement transducer is provided, the signal converter measurement range of this LVDT displacement transducer is large, precision is high, is applicable to the in-site measurement demand of many kinds, high-accuracy flexible production line.
The technical scheme providing according to the utility model, the signal converter of wide range submicron order high precision LVDT displacement transducer, comprises LVDT displacement transducer, the high-precision signal converter of submicron order and PC; The high-precision signal converter of described submicron order is comprised of excitation signal generator, AC amplifier, synchronized sampling pulse producer, synchronous sampler, active filter, high gain DC amplifier, A/D converter, single-chip microcomputer, 232 serial line interfaces; The high stable output terminal of clock of described single-chip microcomputer is connected to the input end of excitation signal generator, described excitation signal generator Yi road pumping signal output terminal is received the pumping signal input end of LVDT displacement transducer, and another road pumping signal output terminal of described excitation signal generator is connected to the pumping signal input end of synchronized sampling pulse producer; The pumping signal output terminal of described synchronized sampling pulse producer is connected with synchronous sampler; The detection signal output terminal of described LVDT displacement transducer is connected to the input end of AC amplifier, the sampled signal input end of the output termination synchronous sampler of described AC amplifier; The output terminal of described synchronous sampler is connected to the input end of active filter; The output terminal of described active filter is connected to the input end of high gain DC amplifier, described high gain DC amplifier Yi road analog signal output is connected to the input end of simulation output interface, and another road analog signal output of described high gain DC amplifier is connected to the input end of analog signal of A/D converter; The digital signal output end of described A/D converter connects the digital signal input end of single-chip microcomputer, and the serial signal input/output terminal of described single-chip microcomputer is connected to the serial signal input/output end of 232 serial line interfaces; Described PC is connected with 232 serial line interfaces; PC is by 232 serial line interfaces and single-chip microcomputer real-time Communication for Power.
Further, the analog voltage signal of simulation output interface output is between-5V ~+5V.
Advantage of the present utility model: great-scale displacement of the present utility model is measured, the wide range LVDT displacement transducer that is employing ± 5mm is realized, adopt the excitation signal energizes LVDT displacement transducer of high stable, adopt the high gain DC amplifier of synchronous sampler, active filter and the high stable of high stable to realize high stable measurement simultaneously, make the high-precision signal converter output of submicron order high stable DC simulation voltage signal proportional to displacement; With high-precision 24 A/D converters, and the signal after conversion is realized to high-precision digital measurement through digital filtering processing.Its measurement range is large, and precision is high, and measurement range is ± 200um that precision is ± 0.2um; Measurement range is ± 500um that precision is ± 0.5um; Can reach ± 3000um of range maximum.
Accompanying drawing explanation
Fig. 1 is electrical block diagram of the present utility model.
Embodiment
The utility model is further described in connection with the embodiment in accompanying drawing below:
As shown in Figure 1, the signal converter of wide range submicron order high precision LVDT displacement transducer of the present utility model, it comprises the high-precision signal converter 13 of LVDT displacement transducer 1, submicron order and the PC 7 of wide range.The high-precision signal converter 13 of described submicron order is comprised of excitation signal generator 2, AC amplifier 12, synchronized sampling pulse producer 3, synchronous sampler 11, active filter 10, high gain DC amplifier 4, A/D converter 8, single-chip microcomputer 5,232 serial line interfaces 6.The high stable output terminal of clock of described single-chip microcomputer 5 is connected to the input end of excitation signal generator 2, the pumping signal output terminal of described excitation signal generator 2 is received the pumping signal input end of LVDT displacement transducer 1, another road pumping signal output terminal of described excitation signal generator 2 is connected to the pumping signal input end of synchronized sampling pulse producer 3, and the pumping signal output terminal of described synchronized sampling pulse producer 3 is connected with synchronous sampler 11; The detection signal output terminal of described LVDT displacement transducer 1 is connected to the input end of AC amplifier 12, the sampled signal input end of the output termination synchronous sampler 11 of described AC amplifier 12, the output terminal of described synchronous sampler 11 is connected to the input end of active filter 10.The output terminal of described active filter 10 is connected to the input end of high gain DC amplifier 4, the analog signal output of described high gain DC amplifier 4 is connected to the input end of simulation output interface 9, and another road analog signal output of described high gain DC amplifier 4 is connected to the input end of analog signal of A/D converter 8.The digital signal output end of described A/D converter 8 connects the digital signal input end of single-chip microcomputer 5, and the serial signal input/output terminal of described single-chip microcomputer 5 is connected to the serial signal input/output end of 232 serial line interfaces 6.Described PC 7 is connected with 232 serial line interfaces 6.
The utility model in use, connects PC by 232 serial line interfaces.PC is by 232 serial line interfaces and single-chip microcomputer real-time Communication for Power.PC 7 reads the measurement conversion value of the high-precision signal converter 13 of submicron order by 232 serial line interfaces 6.
The model of the high-gain AC amplifier 12 of the high stable in the utility model is LF351, the model of single-chip microcomputer 5 is M430F149, the model of pumping signal generator 2 is AD9835, it is LM393 that 3 the model of growing up to be a useful person is sent out in synchronized sampling pulse, the model of synchronous sampler 11 is MF492, the model of high gain DC amplifier 4 is TL074, and the model of described A/D converter 8 is ADS1254; Active filter 10 is known filters.
The proportional high precision of relative displacement of 9 outputs of the utility model simulation output interface and measured workpiece size, the d. c. voltage signal of high stable, the analog voltage signal that simulation output interface 9 is exported is between-5V ~+5V.
The utility model in use, by 232 serial line interfaces 6, be connected with PC 7, with one or two school part, carry out calibration measurement, the measuring-signal of calibrating device is transferred to PC 7 by 232 serial line interfaces 6, record the measured value of school part, can to school part, revise measurement at any time according to actual conditions, PC 7 sends order to single-chip microcomputer 5 by 232 serial line interfaces 6, and obtains the digital measurement result of displacement signal converter.
The utility model has solved the familiar lacunas that signal converter range is little, precision is low of traditional LVDT full-bridge type inductance displacement sensor.The pumping signal output terminal of its excitation signal generator is connected with synchronizing pulse sampler with LVDT displacement transducer respectively, and LVDT displacement transducer is successively connected with AC amplifier, synchronous sampler and active filter.Active filter output analog DC voltage signal.Analog DC voltage signal is successively connected to high beneficial direct current amplifier, A/D converter and single-chip microcomputer, single-chip microcomputer outputting measurement value.The utility model is when measurement range ± 200um, and precision is ± 0.2um; Measurement range is when ± 500um, and precision is ± 0.5um; Can reach ± 3000um of the utility model maximum range.Be applicable to many kinds, high-accuracy, the in-site measurement demand of wide range flexible production line.
Claims (3)
1. the signal converter of wide range submicron order high precision LVDT displacement transducer, is characterized in that: comprise LVDT displacement transducer (1), the high-precision signal converter of submicron order (13) and PC (7); The high-precision signal converter of described submicron order (13) is comprised of excitation signal generator (2), AC amplifier (12), synchronized sampling pulse producer (3), synchronous sampler (11), active filter (10), high gain DC amplifier (4), A/D converter (8), single-chip microcomputer (5), 232 serial line interfaces (6); The output terminal of described single-chip microcomputer (5) is connected to the input end of excitation signal generator (2), described excitation signal generator (2) Yi road pumping signal output terminal is connected to the pumping signal input end of LVDT displacement transducer (1), and another road pumping signal output terminal of described excitation signal generator (2) is connected to the pumping signal input end of synchronized sampling pulse producer (3); The pumping signal output terminal of described synchronized sampling pulse producer (3) is connected with synchronous sampler (11); The detection signal output terminal of described LVDT displacement transducer (1) is connected to the input end of AC amplifier (12), and the output terminal of described AC amplifier (12) connects the sampled signal input end of synchronous sampler (11); The output terminal of described synchronous sampler (11) is connected to the input end of active filter (10); The output terminal of described active filter (10) is connected to the input end of high gain DC amplifier (4), described high gain DC amplifier (4) Yi road analog signal output is connected to the input end of simulation output interface (9), and another road analog signal output of described high gain DC amplifier (4) is connected to the input end of analog signal of A/D converter (8); The digital signal output end of described A/D converter (8) connects the digital signal input end of single-chip microcomputer (5), and the serial signal input/output terminal of described single-chip microcomputer (5) is connected to the serial signal input/output end of 232 serial line interfaces (6); Described PC (7) is connected with 232 serial line interfaces (6); PC is by 232 serial line interfaces and single-chip microcomputer real-time Communication for Power.
2. the signal converter of wide range submicron order high precision LVDT displacement transducer as claimed in claim 1, is characterized in that: the analog voltage signal of described simulation output interface (9) output is between-5V ~+5V.
3. the signal converter of wide range submicron order high precision LVDT displacement transducer as claimed in claim 1, is characterized in that: described PC (7) reads the measurement conversion value of the high-precision signal converter of submicron order (13) by 232 serial line interfaces (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320694624.9U CN203561332U (en) | 2013-11-05 | 2013-11-05 | Signal converter of wide-range submicron high-precision LVDT displacement sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320694624.9U CN203561332U (en) | 2013-11-05 | 2013-11-05 | Signal converter of wide-range submicron high-precision LVDT displacement sensor |
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| Publication Number | Publication Date |
|---|---|
| CN203561332U true CN203561332U (en) | 2014-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320694624.9U Withdrawn - After Issue CN203561332U (en) | 2013-11-05 | 2013-11-05 | Signal converter of wide-range submicron high-precision LVDT displacement sensor |
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| Country | Link |
|---|---|
| CN (1) | CN203561332U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103528492A (en) * | 2013-11-05 | 2014-01-22 | 无锡市迈日机器制造有限公司 | Signal converter of high-measurement-range submicron-level high-precision LVDT (linear variable differential transformer) displacement sensor |
-
2013
- 2013-11-05 CN CN201320694624.9U patent/CN203561332U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103528492A (en) * | 2013-11-05 | 2014-01-22 | 无锡市迈日机器制造有限公司 | Signal converter of high-measurement-range submicron-level high-precision LVDT (linear variable differential transformer) displacement sensor |
| CN103528492B (en) * | 2013-11-05 | 2016-07-06 | 无锡市迈日机器制造有限公司 | Signal translating system based on wide range submicron order high accuracy LVDT displacement transducer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140423 Effective date of abandoning: 20160706 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |